Base-Promoted Tandem Pathway for Keto-Amides: Visible Light-Mediated Room-Temperature Amidation Using Molecular Oxygen as an Oxidant
作者:Suman Das、Soumya Mondal、Siba P. Midya、Subal Mondal、Eliza Ghosh、Pradyut Ghosh
DOI:10.1021/acs.joc.3c00686
日期:2023.11.3
electron-rich aromatic amines, aliphatic amines, and phenacyl bromide derivatives proceeded the present transformation with marginally superior reactivity in comparison to electron-deficient aromatic amines and phenacyl bromide derivatives. Moreover, several control experiments, in situ isolation of secondary amine and imine as key intermediates, and 18O-labeling experiments provide complete insight into the mechanism
在此,我们报道了使用分子氧作为氧化剂以及酰胺链段中的氧源,从原料苯甲酰溴和胺合成α-酮酰胺的无金属和光催化剂的室温酰胺化。可见光介导的碱基促进的一锅连续 C-N/C=N/C=O 键形成以串联方式发生,以提供所需的产物。官能团耐受性(苯甲醇、酮、氰基、硝基、卤代等)、广泛的底物范围和克级合成使这种合成方法更具吸引力。我们观察到,与缺电子芳香胺和苯甲酰溴衍生物相比,富电子芳香胺、脂肪胺和苯甲酰溴衍生物进行了本发明的转化,其反应活性稍高。此外,一些对照实验、作为关键中间体的仲胺和亚胺的原位分离以及18 个O 标记实验提供了对串联途径机制的完整了解。